Swipe Down for Full Video Story Could intelligent alien civilizations really exist somewhere beyond Earth? As advanced telescopes continue discovering new potentially habitable worlds every year, that possibility seems more realistic than ever.

Astrobiologists are raising concerns that humanity’s search for alien life may be limited by the very tools designed to find it.

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life.